Coating and moistening mechanism for duplicating apparatus



Sept. 20, 1949. 5. w. PETERSON ETAL COATING AND MOISTENING MECHANISM FORDUPLICATING` APPARATUS Original Filed July 23, 1942 "lY sheets-sheet 1**lull IIIIIIIIIL INVENTORS: Eric M Peter''on. @En J Campzouse- Sept. 20,1949. E. w. PETERSON ETAL 2,482,636

COATING AND MOISTENING MECHANISM FOR DUPLICATING APPARATUS OriginalFiled July 25, .1942

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CQATING AND MOISTENING MECHANISM Y FOR DUPLICATING APPARATUS OriginalFiled July 23, 1.942 7 Sheets-Sheet 3 1NVENTORS': Eric wjoeerson. B@knuf Cam houseV Sept. 20, 1949. 5. w. PETERSON ETAL COATING ANDMOISTENING MECHANISM FOR DUPLICATING APPARATUS 2 original Filed July 2s,194

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E. w. PETERsoN ETAL 2,482,636 COATING AND MOISTENING MECHANISM FORDUPLICATING APPARATUS '7 sheets-sheet 5 Original Filed Ju'ly 23, 1942INVENTORS: Eric UPev/enson Jhn L77 Camphouse 1 SePt- 20, 1949 E. w.PETERSON ETAL 2,482,536

COATING AND MOISTENING MECHANISM FOR DUPLICATING APPARATUS OriginalFiled July 23, 1942 7 Sheets-Sheet 6 Iygfg. 15. /Zc Zeb) J9.

L zNvENRsr 35 Eric Uftenson \7 n JCqrnp/Twue- Sept 20, 1949 E. w.PETERSON ErAL 2,482,636

COATING AND MOISTENING MECHANISM FORDUPLICATING APPARATUS Original FiledJuly 23, 1942 7 Sheets-Sheet '7 INVENTORS. Pe Ze rson BY John J7C'@A7-r1.77101x642,Y W MW s Patented Sept. 20,1949

UNITED STATI-:s PATENT oFFicE cosmo AND Mols'rimma am Foa nUrucA'rmGmaaa'rus Erle W.'Peterlon, Muskegon, Mich., and John J.

Campliousc, Oak Park,

Incorporated, West Virginia asalgnors to Ditto, lll.. a corporation of lapplication July 23, 1942, Serial No. 452,022. Divided 'and thisapplication Marcil 23, 1946. Serial No. 356.698

lclalml.

Our invention relates to duplicating apparatus, and more particularly tomeans of duplication adapted to take copies of selective brightness froma master copy by applying to selective portions of a copy sheet acoating additional to or diierent from that applied by the usualmoistening mechanism. This is a division of our application .for patenton Duplicating apparatus, Serial No. 452,022, illed July 23, 1942, nowabandoned. The invention is particularly applicable to the making ofcopies upon rag stock and socalled bond paper in such a manner as toproduce fadeproof, bright and sharp characters. One form of theinvention is embodied in a duplicating apparatus of the general typeshown in ap# plication Serial No. 403,355, filed July 21, 1941 byStephen Kokay, now Patent No. 2,337,721, issued December 28, 1943, andthe improved apparatus taken oi' Fig. l;

Fig. 'r is a sectional view taken cn the une 1-1 of Fig. 1;

Fig. 8 is `a somewhat diagrammatic view illustrating the position of themaster copy sheet,

of the present invention comprises additional elements which are appliedto the apparatus shown in the aforesaid application, these additionalelements serving to enable the operator to apply a controlled amountvofa coating, either liquid or otherwise, to a copy sheet in advance ofyits moistening by the moistening means of the duplicatingy apparatus. l

'Ihe duplicating apparatus embodies a rotary drum having means thereonfor attaching a master copy thereto and having means for releasablyholding block-out sheets in position to be interposed between the mastercopy and copy sheets which are moistened andthen brought into engagementwith the master copy on the drum. A separate mechanism particularlyadapted for applying a moistening iluid of a special character to thecopy sheet is mounted in advance of the moistening means of the standardduplicating apparatus in such fashion that it may be thrown intooperation at the will of the operator and stepped from one position toanother lengthwise of the drum in order selectively to apply its fluidto a particular portion of the copy sheet without interfering with theapplication of the moistening iluid to the whole of the copy sheet bythe usual moistening means.

The objects and advantages of the invention will appear more fully asthe description proceeds, reference being had to the accompanyingdrawings wherein a preferred form of the invention is shown. It shouldbe understood, however, that the drawings and description areillustrative only and should not be taken as limiting the invention,except insofar as it is limited by the claims.

In the drawings:

Fig`. 1 is a side view partly in section illustrating block-out sheetsand a copy sheet (an envelope), looking upwardly from beneath it toillustrate the relative position or the parts at the beginning oi theduplicating operation;

Fig. 9 is a plan view ot a block-out sheet;

Fig. 10 is a plan view of a copy sheet such as would require specialtreatment, the sheet shown being a simulation of a bond such as adefense bond;

Fig. 1l illustrates, upon an envelope, the posiytion in' which copywould be applied by the arrangement shown in Fig. 8;

Fig. 12 is a view similarto Fig. 9 showing a slightlydillerent form ofblock-out sheet;

Fig. 13 is a diagrammatic view showing a master copy set such as wouldbe used in the apparatus embodying the present invention;

Fig. 14 illustrates a standard form of defense bond set to which thepresent invention isparticularly applicable:

Fig. I5 is a sectional view taken on the line IB-l!v of Fig. 13;

Fig. 16 is a sectional view taken on the line IC-IB o1' Fig. 14;

Fig. 1'1 is a sectional view taken -on the line I'I-I'I of Fig. 14;

Fig. 18 is -a -plan view of a portion of the defense bond set;

Fig. 19 is a plan view of another portion of the defense bond set;

Fig. 20 is a sectional view taken substantially on the line 20- 20oiFlg. 8:

Fig. 21 is a diagrammatic view similar to Fig.

. 13 illustrating one step of the process of duplieating upon a bond;

Fig. 22 is a view similar to Fig. 21 illustrating the relative positionof the parts for a duplication upon a second bond; and

Fig. 23 is a similar view to Figs. 21 and 22 illustrating the positionof the parts for duplication on the last Abond of a series to which theinformation upon the master set is to be applied. i

Referring now in detail to the drawings, the present invention isembodied in a duplicating apparatus of the so-called liquid process typewherein a duplicating machine having two side frames I and II isprovided with a duplicating drum I2that in turn has a gripping mechanismI3 adapted to secure a master copy [4 to the drum. The drum I2 is alsoprovided with a magnetic block-out sheet holding slot I5 in which one ormore .block-out sheets I6 are movably secured. The details of themagnetic block-out slot are already known. For the purposes of this Yinvention it is suiiicient to state that the slot in the drum receives ametallic magnetically attractable strip I1 that is formed on one edge ofthe block-out sheet I6 and by virtue of the magnetic attractionreleasably holds the strip I1 in the slot. The gripping of the strip I1is suf- -cient to hold it in place during a normal duplicating operation`but it permits the strip to slide lengthwise of the slot under theinfluence of a comparatively small force applied at the end of thestrip, A

The duplicating apparatus includes a drive mechanism for rotating thedrum I2, this drive mechanism being shown as including a gear I8operatively connected to the drum, a drive pinion I9 secured to the sideframe I0, and a pulley 20 iixed to the pinion I9. The pulley 2U isdriven by a belt 2I which in turn is driven by a speed reducing pulleyassembly 22 mounted on the frame of the machine, `the assembly 22 beingdriven by a belt 23 from a motor 24. A platen roller 25 is mounted inthe machine in position te engage and press a copy sheet 26 against thedrum and the sheets thereon as the drum is rotated. A moisteningmechanism is provided comprising a moistening roller 21, a counterroller 28 usually of absorbent material adapted to cooperate with themoistening roller in feeding a copy sheet to the drum, and a thirdroller 29 which cooperates with the moistening roller 21 to pass alimited amount of liquid downwardly between the rollers 21 and 29 sothat it may be spread upon the copy sheet. The rollers 21 and 29 aresupplied with a liquid from a spray tube 30 which in turn receives theliquid through a conduit 3| from a tank 32 mounted in the frame of themachine. The tank contains a pump (not shown) which is operated inl aknown manner from the driving mechanism for the drum, and the moisteningmechanism includes a suction tube 33 disposed in the trough formed bythe rollers 21 and 29 and connected by a conduit 34 to a'suction devicein the tank 32, all as shown in the prior Kokay application abovereferred to.

The duplicating apparatus is provided with a feed tray on which the copysheets 26 are placed and advanced t0 the rollers 21 and 28, Beneath theroller 29 there is a guard plate 36 which directs the copy sheets to thebite of the rollers 21 and 28. The apparatus is also provided with areceiving tray 31 into which the copy sheets are discharged after havingbeen printed upon by the duplicating machine.

In order that the featur of the present invention may bel more readilyunderstood, the details of the duplicating operation as directed to theparticular problem will now be explained in connection with Figs. 8 to23, inclusive. The

particular operation to which the present invention relates is that ofselectably copying upon individual rag stock bonds or like items andtheir associated vrecord cards specificblocks or lines of informationcontained upon 'a master copy. The master copy is shown best in Figs. 13and 15 as a set whichis used in the making out of information for. thepurposes of issuing bonds and the like. This master set comprises afront sheet I4 of a suitable sheet of paper such as is used for 'mastersheets in liquid process duplication. It will be noted that this sheethas blocked out thereon a multiplicity of information receiving portions38. Beneath the front sheet I4 there is placed a hectograph carbon sheetI4a with its active face directed toward the sheet I4, and beneath thesheet I4a is a second carbon sheet I4b of record carbon having itsactive face directed away from the carbon sheet I4a and toward a plainsheet I4c. The operator who is about to make out'a series of bonds orwho is about to make a master copy from which some other operator canmake out a series of bonds takes the master sheet just described andtypes in the` several spaces .38 such information as the name, addressand beneciary of each of several bond purchasers. By this typingoperation a master copy in reverse is formed on the back of the sheet I4by reason of the presence of the hectograph carbon I4a. Likewise arecord copy not in reverse is formed on the front surface of the sheetI4c by reason of the presence of the record carbon I4b. After thetypewriting operation the record copy I4c and the carbon sheets I4a andI4b are removed from the master copy sheet I4 and this master copy sheetis then ready for use in the duplicating operation.

In Fig. 14 and Figs. 16 to 19, inclusive, the details of a bond set areillustrated. For purposes of this description the bond set 26 will beassumed to be composed of a plurality of copy sheets. The front sheet ofthe set shown in Fig. 14, indicated by the numeral 26a, is the bonditself and as illustrated in Fig. 10 this bond sheethas a space 39 inwhich the information from a single one of the spaces 38 is to bereproduced. These bond sheets,

since they are to last a long time and are to be' subjected often timesto rather careless handling, are made of a tough paper capable ofwithstanding long hard usage. Rag stock is usually used for this type ofpaper and the bond of course is printed with various insignia anddecorations as Well as specific detailed information that is com-1 monto al1 bonds of a series or group. In addition for the purposes ofrecord keeping there are included with the bond sheet 26a tWo recordcards 26h and 26e, which Vrecord cards are adapted to be used in sortingmachines or other recording devices.' and these record cards must alsoreceive at least a part of the information and usually all of theinformation contained in one of the spaces 38 on the master copy sheetI4. As shown,

the three sheets 26a, 2Gb and 26e make up a set all connected to acommon edge portion 26dand perforated at the connection so that they canbe readily separated from the connecting portion 26d. A backing sheet26e is also formed integrally with the record card 26e but is separabletherefrom by a line of perforations as illustrated in Fig. 14.

On order to utilize the duplicating apparataus in making the necessaryentries upon the several I l y in position on the drum I2 ofthevduplicating machine so that one side edge thereof is clamped in thegripping mechanism I3 to lie in the position shown in Fig. 8. Theblock-out sheet I5b is secured in place and for lthe irst envelope to berun this block-out sheet I6b is placed in the same position as that inwhich the block-out sheet I5a is shown in Fig. 21 for the first copy.The envelope 4| is then fed to the duplicating apparatus where it willbe moistened by the moistening roller 21, and the narrow openingprovided in the blockoutsheet I5b will permit a copy to be made of thename and address of the person to whom the bond is being issued on theenvelope. The several envelopes corresponding to a number of spaces 38on the master copy sheet I4 may thus be provided with the names'andaddresses by the simple expedient of advancing the block-out sheet I8blengthwise of the drum until all of the copies are made. It is necessaryin order to be able to utilize the full available length of the mastercopy sheet I4 to utilize, in certain conditions, a small auxilto insureprotection of the bond.

Cil

iary block-'out sheet I6c that protects the master copy sheet I4 fromengagement with the moistened envelope 4I where this envelope projectsover the side edge of the block-out sheet 15b. However, where the lengthof the drum permits the use of a wider block-out sheet I6b the use of ythe narrow block-out sheet I6c may be eliminated. In the copying of theinformation on the bond itself and the associated record cards theblockout sheet I6a is used and the mechanical operations are essentiallyas shown in Figs. 21, 22 and 23'; that is, initially the block-out sheetIGa is placed over the master copy sheet I4 in such position that itswindow exposes the top one of the spaces 38 as shown' in Fig. 21 and abond 26a is detached from its connecting portion 26d and fed through themoistening mechanism so as to receive in the space 39 thereof the name,address and beneciary of the purchaser of the bond. 'Ihe block-out sheetIta has to be moved to expose the next space 38 for the next bond, but-before the block-out sheet Ilia is moved the two record cards 26h and26e are detached Ifrom their connecting portion 26d and receive theircopy so that there is no danger of getting the wrong name and addressupon a record card that is already printed with a serial numbercorresponding to the bond. The next bond is then placed in such positionas to receive an imprint from the second space 38, the block-out sheet16a being moved along the slot lengthwise of the drum to uncover thesecond space 38. When the block-out sheet I 5a is advanced to uncoverthe second space 38 it becomes necessary-in instances where the lengthof the drum of the duplicating machine would not permit the use of awider block-out sheet; to use the small block-out sheet IGc as shown inFig.

22 to protectl the bond itself from receiving an imprint from the rstspace 38 of the master copy sheet.

The bonds and the record cards are thus imprinted until copies have beenmade of all the names and addresses, etc. found in the spaces 38. As thelower spaces are approached it is sometimes fcund that the length of theduplicating drum is insuiiicient to permit the block-out sheet to movefar enough to the right, as viewed in Figs. 21 to 23. In such case theIblock-out sheet is merely turned over and in order to protect the bonditself the small block-out sheet I6c is placed to the right of thelarger sheet I6a as shown in Fig. 23 so as to protect the bond from theimprint of the last space 38. Naturally if more than one With theforegoing description of the duplicating operation it will beappreciated that in order to treat the bond and where necessary therecord cards with special materials to enable bright. fadeproof andclean-cut copies to bey made it may be necessary to specially treat thatparticular portion of the bond on which the copy is to be made. In thepresent apparatus a special treating unit 43 is mounted over the feedtray I5 in advance of the moistening rollers 21 and 28. This apparatus43 comprises two'si'de frames 44 and 45 in which are mounted a series ofrollers 45, 41, 48 and 49. The roller 48 is mounted on a shaft 46a thatis directly journaled in the side fra-mes `44 and 45. The roller 41 hasits shaft 41a journaled in two bearings 58 and 5I which ride in twoslots 52 and 53 provided in the side frames 44 and 45 (see Fig. 6). Thebearings 50 and 5I are spring pressed downwardly `by means oi' twosprings 54 and 55 andthe tension on these springs is adjustable by meansof two adjusting screws 58 and 51 threaded through two bars 58 and 59that extend over the slots 52 and 53, the bars of course being securedin place on the side frames 44 and 45. The roller 48 is spring mounted.It has its shaft 48a mounted in bearing blocks 48h, one of which isshown in Fig. 3. These bearing blocks are provided with pins 48e thatserve as guides for springs 48d. The bearing Iblocks 48b and the springs48d t in openings 6I) that are cut in the side frames 44 and 45, theopenings being keyhole shaped so as to provide guides for. the blocks48h. It will be observed from an inspection of Fig. 3 that if the roller41 is pressed downwardly it tends to move theroller 48 back against thetension of the springs 48d, but the springs 48d permit the bearingblocks 48h to adjust themselves so as to maintain the proper tensionbetween the rollers 41, 48 and 49.

The roller l49 is mounted inside a receptacle 5I that has suitableflanges 82 and 53 fastened to .the side frames 44 and 45. Thisreceptacle has a `shield and wiper 64 extending across the top.

thereof and adapted to engage the roller 49. The shield 54 is mounted ona U-shaped bracket that is fastened to the side frames 44 and 45 (seeFig. 7).' A special treating material, usuallyv The entire device 43 iscarried upon a cross' bar 1| (see Figs. 2 to 5. inclusive). This crossbar is provided with a square section intermediate its ends and its endsare supported in upstanding frame portions 12 and 13 that are fastenedon. the side frames I Il and II. The -bar 1I slidably receives a block14 that is secured to the side frames 44 and 45 and this Ib-lock isprovided witlh a spring pressed detent 15 that is adapted to engagerecesses 16 provided at spaced intervals along the bar 1I. A handle 11serves as a housing for a spring 18 that presses the detent 15 inward.The bar 1I at its right-hand end, as viewed in Fig. 2, is supported by aconnecting block 19 that connects to a head 80 on the shaft 8I that isrotatably mounted in the frame portion 13.I A knurled hand piece 82 isalso fixed to the shaft 8| 'so that by rotating the hand `block 83 (seeFigs. 2 and 4).

7 piece 82 the bar 1l can be turned to raise or lower'the device 4I. Atthe other end of the bar 1| means are provided whereby the bar can beoperated directly from the drum so as to lower the device 43 intooperative position at the proper time and to lift it out of the way inorder that copy sheets may be fed beneath theroller 48. The mechanism bywhich the bar 1| is operatively connected tothe drum Vcomprises aconnecting This connecting block is tubular and the end of the bar 1|extends into the connecting block. A pin 84 in the end of .the bar 1Irides in two slots 85 and 88 provided inthe block 83. The connectionbetween the bar 1,| and the blockv 83 is made rigid by a nut 81 threadedon the bar 1| and -a lock-nut 88 for holding the nut 81 in place. Itwill be evident .that when the nut 81is tightened the end of the block83 is clamped between the pin 84 and the nut 81. Atlts other end theblock 83 receives a connecting shaft 89 and the block itself is slotted,aslindicated at 90 (see Fig. 4)', to receive a pin 9| that is fastenedin the shaft 89. The shaft 89 extends into a housing made up of theframe member 12 and a face plate 12a. Suitable bearings 92 vand 93 areprovided for the shaft 89, these bearings being mounted in the members12 and 12a. A lever 94 is ilxed to the shaft 89 and extends downwardlytherefrom. This lever is provided with a roller 95 at its lower end.

An actuating -lever 98 is pivoted on a stub shaft 91 fastened to thelower end of the plate 12a and extends downwardly below the stub shaft91 ywhere it connects to an operating bar 98. The operating bar 98extends through -a cross head 99 that is fastened to a cam lever |00. Acoil spring I 0| is mounted on the bar 98 between a washer |02 whichbears against a cotter pin |03 secured in the bar 98 near the lever 98and the cross head 99. The end ofthe bar 98 extends through the-crosshead and is free to slide therein against the tension of the spring |0I.The nut |84 and' a lock-nut |05 are threaded onto the eend of the bar 98that passes through the cross head 99. The cam lever |00 is pivoted onthe side frame I0 by a stub shaft |08. The cam lever has a short arm |01that carries a cam roller |08 at its freeV end. This 4cam `roller ridesupon aicam |09 and rotates with the drum. The cam |09 is provided with araised portion H0. A coiled spring 4`ill connected between the lower.end ofgthe lever |00 and a fixed portion of the frameworkinbrmallyholds the lever turned to the limit of its vmotion into engagement witha y stop bloclgl I2, as shown in Fig. 5.

The operation of themechanism just described lower the roller 48 is asfollows: As the drum proaches home position as shown yin Fig.'3thei'aised portion ||0`of the-cam |09 engages the roller |08 to rock thelever |00 in a clockwise direction about its pivot |08. This in turnmoves the cross head 99 to the left and due to the heavy spring I0| thiscauses the bar 98 to move to the left and turn the lever 98 in aclockwise direction about its pivot. The upper end 98a of the lever 98presses on the roller 95 so as to rock the lever 94 in acounterclockwise direction which in turn turns the cross bar 1| gagessaid forwarding means.

l.as the mechanism for rotating'the roller 48 so that in turn therollers 41, 49 and 49 are rotated to feed liquid onto the roller 48 `andthus moisten the top of a copy sheet. It will be noted that there isconsiderable delay in this feeding operation and for this purpose it isadvisable to prime the roller 48 at the start of a series of duplicatingoperations in order that the roller may have an adequate supply ofliquid. If it is desired to render the device 4I inoperative it isturned back by means of the hand piece 82 and thus held out of theway.-The hand piece 82 desirably contains an interlocking mechanism (notshown) b`y which rit can be locked in position to hold the device 48raised. It will be noted that when the device 43 is raised the lever 94will be moved out of the way of the lever 98 so that the continuedoperation of this lever by the actuation of the drum will have noeffect.

As an example of the type of treatment that is employed by means of theapparatus just described it has been found that by thevuse of abentonite and special dye solvent solution exceedingly bright andfadeproof copies can be made on rag stock, bond paper and the like. Wetherefore use this type of solution in the receptacle 8| and thesolution is applied selectively only to that part of the bond that isgoing to receive the copy from the master sheet. It is thus possible toutilize the duplicating apparatus in normal manner for normal copy workon copy sheets that are of the usual copy paper, and whenever it isdesired to make a particular part of the copy stand out the device 4I islowered into position to apply its special solution to that part of thecopy sheet that is to receive the bright appearing copy.

From the above description it is believed that the features andadvantages of our invention will be readily apparent to those skilled inthis art.

We claim:

1. In a duplicating apparatus, the combination of sheet moisteningforwarding means extending across transversely of the machine forforwarding and moristening sheets one at a time, and means adjustabletransversely of the machine sheet being carried forwardly by saidforwarding vmeans before said portion engages said forwarding means.

2. In a duplicating apparatus, the combination of sheet moisteningforwarding means extending across transversely of the machine forforwarding and moistening sheets one at a time, and means comparativelymuch narrower than the machine and adjustable transversely of themachine adapted when in operative position to apply a coating to acomparatively narrow portion of one face of a sheet being carriedforwardly by said forwarding means before s'aid p ortion en- 3. In aduplicating apparatus, the combination of two cooperating forwardingrollers extending acrosstransversely of the machine for forwardingsheets one at a time, means compris- 4- ing a comparatively much shorterroller adjustin a direction to lift the device 43l to the position shownin Fig. 3. In this position the roller 48 rises above the feed tray 35so that the copy sheet may pass beneath it. When the actual duplicatabletransversely of the machine adapted when in operativeposition to apply acoating to a comparatively narrow portion of one face of a sheet l beingcarried forwardly by said forwarding rolling operation starts the roller|08 moves oif thel high spot ||0 of the cam |09 and this allows themember 43 to drop until the roller 48 engages 4. In a duplicatingapparatus, the combination of two cooperating forwarding Irollersextending across transversely of the machine for forwarding sheets oneat a time. means comprising Va comparatively much shorter roller movablebetween a raised -inoperative -position and a lowered operative positionand adjustable transversely of the machineadapted when in operativelowered position to apply a coating to a comparatively narrow portion ofthe top face of a sheet being carried forwardly by said forwardingrollers, and means for'moving said shorter roller out of ,operativeposition to permit feeding of sheets .to said forwarding means withoutengagement of said shorter miler therewith.

5. In a duplicating apparatus, the combination of a sheet moisteningforwarding means extending across transversely of the machine forforwarding and moistening sheets one at a time, means comparatively muchnarrower than the machine and adjustable transversely of the machineadapted when in operative position' to ap- Dly a coating to acomparatively narrow portionrear of id sheet forwarding means, a coatingmechanism comparatively much narrower than timed relation with themachine for moving said of one face of a sheet being carried forwardlyby o said forwarding means before said portion engages-said forwardingmeans, and readily releasable means adapted normally to hold said,coating means in any of a plurality of different adjusted positionstransversely of the machine.

6. In a duplicating apparatus, the combination of a sheet forwardingmeansv extending across transversely of the machine for forwardingsheets one at a time, a rock bar extending across't'o the e rear of saidsheet forwarding means, means carried by said rock bar for giving thebar a slight rotary movement, a coating mechanism comparatively muchnarrower than the machine mounted on said rock bar so as to rocktherewith but so as to be slidable transversely of the machine 'on thebar and adapted when in lowered operative position to apply a coating'to a comparatively narrow portion of the face of a sheet being carriedforwardly by said forwarding means before engagement of said bodyportion with said forwarding means, and readily releasable means forconnecting said coating mechanism releasably with said bar for holdingthe coating mechanism in a xed adjusted position on said rock bartransversely of the machine, said connecting means being unaected byrocking movements of said bar.

7. In a duplicating apparatus, the combination of a sheet moisteningforwarding means extending across transversely of the machine forforwarding and moistening sheets one at a time, a rock bar extendingacross to the rear of said sheet forwarding means, a coating mechanismcomparatively much narrower than the machine mounted on said rock bar soas to rock therewith but so as to be Islidable transversely of themachine on the bar and adapted when in lowered operative position toapply a coating to a comparatively narrow portion of the face of a sheetbeing carried forwardly by said forwarding means before said portionengages said forwarding means, and means actuated at timed intervals inthe operation of the machine for rocking said rock bar for moving saidcoating mechanism upwardly out of operative position so as to permit acopy sheet to be inserted readily underneath said coating mechanism.

8. In a duplicating apparatus, the combination lever toa position tomove said coating lmechanism upwardly .out of operative position,yielding means engaging said lever to normally hold said lever in theposition corresponding to the lowered operative position of said coatingmechanism, and other yielding means in the connections between saidlever and said coating mechanism for cushioning the action of'said camon said coating mechanism.

9. In a duplicating apparatus, the combinatiom of a sheet forwardingmeans extending' across transversely of the machine for forwardingsheets one at a time, a'rock shaft extending across to the rear of saidsheet forwardingmeans, two plates slidably mountedon said rock shaft andextending forwardly therefrom, a'shor't roller rotatably mounted betweensaid plates; a tank mounted between said plates to the rear of saidshort roller, a second roller rotatably mounted between said plates inposition to pick up a supply'of. liquid from said tank, and means fortransferring a film of liquid from said second roller to said firstnamedroller for application to -the top face of a sheet being carriedforwardly by said forward,- ing means, all said rollers and said tankbeing mounted forwardly of said rock shaft.

10. Inv a duplicating apparatus,vthe combination of `a sheet "forwardingmeans extending across transversely of the machine for forwarding sheetsone at a time, a rock shaft-extending of a sheet forwarding meansextending across across to the rear of said sheet forwarding means, twoplates slidably mounted on said rock shaft and extending forwardlytherefrom, a` short roller rotatably mounted between said plates, a tankmounted between said plates to the rear of said short roller, a secondroller rotatably mounted between said plates in positionto pick up asupply of liquid from said tank, a third roller rotatably mounted inposition to engage said first-named roller and movable downwardly andbackwardly with respect thereto, a fourth roller rotatably mounted in,position to engage said second and, third rollers and movabledownwardly and forwardly with respect thereto, and yielding means forpressingsaid third and fourth rollers yield- 4 ingly downwardly forcontrolling the thickness of the f ilm of liquid applied to saidfirst-named roller.

11. A device for applying a special fadeproof liquid to copy sheets forliquid process duplica'- tion, comprising two plates, a roller rotatablymounted between said plates, a tank mounted between said plates adjacentto said roller, a second roller rotatably mounted between said plates inpositionr to turn in and pick up liquid in said tank, and means fortransferring a film of liquid from said second roller to saidfirst-named roller for application to a copy sheet engaging said firstnamed roller, said tank being pivoted to the side plates for downwardswinging movement about 1l f its pivots, and a spring catchv releasablyholding said tank infraised position.` v

12. A device for applying a special fadeprooi.'

liquid` to copy sheets for liquid process duplica.-

tion, comprising two plates, a roller rotatably lower the plates and thetank and rollers carried thereby, said first named roller engaging acopy sheet .to apply a lm of liquid thereto in the lowered position ofsaid plates only. y

13. A device for applying a.V special fadeproof liquid to copy sheetsfor liquid process duplication, comprising two plates) a roller.rotatably mounted between said plates, atank mounted bey aisaesc' tweensaid plates adjacent to said roller, a second roller rotatably mountedbetween said plates in position to turn in and pick up liquid in saidtank. and means `for transferring a illm of liquid from said secondroller to said iirst-named roller, a rock shaft at one end of saidplates and support- 'ing them, a support for said rock shaft, and meanstov turn said shaft whereby toraise and lower the plates and the tankand rollers carried thereby, saidv plates being adjustable lengthwise lof the rock shaft, said ilrst named roller engagirig a copy sheet toapply a lm of liquid thereto inthe lowered positionof said plates only.

14. A device for applying. a specialfadeproof liquid to copy 'sheets forliquid process duplication, comprising two plates, a roller rotatablylmounted between said plates. a tank mounted between said plates adjacentto said roller, a second roller rotatably mounted between said plates inposition to turn in .and nick up liquid in said tank, and means fortransferring a nlm of liquid from said secondroller to said iirst namedroller for application to a' copy sheet engaging said first namedroller. said means comprising two spring'4 pressedrollers adjustable indifferent planes toward and away from the ilrst named rollers.

15. In a duplicating apparatus, the vcombination of sheet forwardingmeans extending across transversely of the machine for forwarding copysheets one at a time, means adjacent to said sheet forwarding meansadapted whenin operative position by engagementwith a sheet beingcarried forwardly b'y said forwarding means to apply a coating tooneface of said sheet, and means actuated by the operation of the machinefor moving said coating means periodically into and out of sheetengaging position for first permitting the feed of a copy sheetto saidforwarding means without engagement of said coating means therewith andthen engaging saidcoating means with said sheet in timed relation toeach duplicating operation, 'and means for holding said coating meansout of sheet engaging position irrespective of the actuation of saidmeans for moving said coating means periodically.

. ERIC W. PETERSON.

JOHN J. CAMPHOUSE.

REFERENCES CITED The following references are of record in the ille oithis patent:

UNITED STATES PATENTS Great Britain 4-....' iDec. 19, 1934

